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Momentary Outage Causes <br /> The ability to track momentary outages can be difficult or unavailable on some systems, but due to the <br /> hazard they pose for electronic equipment, it is important to track and analyze momentary causes. In this <br /> section, we evaluate common causes of momentary outages for your utility, region and customer size <br /> class as well as common causes for all utilities that use the eReliability Tracker. Please note that only <br /> outages lasting less than five minutes are classified as momentary, as defined by IEEE 1366. <br /> Figure 11 <br /> Top five customer-weighted occurrence rates for common causes of momentary outages for all <br /> utilities that use the eReliability Tracker Service 2 <br /> 0.18 - 0.1559 <br /> 0.16 - <br /> a 0.14 <br /> (13 0.12 - <br /> cc <br /> • 0.1 - <br /> m 0.08 - 0.0618 0.0575 <br /> • 0.06 - 0.0477 0.0464 <br /> 0.04 - <br /> 0.02 - <br /> 0 I I I <br /> Unknown Customer Service Tree Storm Utility Maintenance and <br /> Repairs <br /> Outage Cause Types <br /> Figure 12 <br /> Top five customer-weighted causes of momentary outages for your utility2'3 <br /> 0.1 - 0.0948 <br /> 0.08 - <br /> m <br /> a)• 0.06 - <br /> U <br /> C <br /> N <br /> 0.04 - <br /> U <br /> U <br /> O 0.02 - <br /> 0 0 0 0 <br /> 0 <br /> Electrical Failure None None None None <br /> Outage Cause Types <br /> 3 <br /> If your utility has less than eight momentary outages recorded in the eReliability Tracker,this graph will be blank. <br /> 12 <br /> 105 <br />